<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
           <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
           <el-breadcrumb-item>商品管理</el-breadcrumb-item>
           <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>
        
        <!-- 卡片区域 -->
        <el-card>
            <!-- alter警告区域 -->
            <el-alert
            title="注意！只允许为第三级分类添加相关参数！"
            type="warning"
            show-icon
            :closable="false">
            </el-alert>

            <!-- 选择框区域 -->
            <el-row style="margin-top: 15px">
                <el-col>
                    <span>选择商品分类：</span>
                    <!-- 级联选择框 -->
                    <el-cascader
                     v-model="selectedCateKeys"
                     :options="catelist"
                     :props="cascaderprop"
                     @change="handleChange"
                     size="small"></el-cascader>
                    </el-col>
            </el-row>

            <!-- tab标签页 -->
            <el-tabs v-model="activeName" @tab-click="handleTabClick">

              <!-- 动态参数页面 -->
              <el-tab-pane label="动态参数" name="many">
                <!-- 添加参数按钮 -->
                 <el-button type="primary" size="mini" :disabled="isBtnDisable" @click="addManyData()">添加参数</el-button>
                 <!-- 动态参数表格 -->
                 <el-table :data="manyTableDate" border stripe>
                   <!-- 展开行 -->
                   <el-table-column type="expand">
                     <template v-slot="scope">
                       <!-- 循环渲染tag标签 -->
                       <el-tag v-for="(item , i) in scope.row.attr_vals" :key="i" style="margin-right: 10px" closable @close="handleClose(i,scope.row)">
                           {{item}}
                       </el-tag>
                       <el-input
                       class="input-new-tag"
                       v-if="scope.row.inputVisible"
                       v-model="scope.row.inputValue"
                       ref="saveTagInput"
                       size="small"
                       @keyup.enter.native="handleInputConfirm(scope.row)"
                       @blur="handleInputConfirm(scope.row)"
                       >
                       </el-input>
                       <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button> 
                     </template>
                   </el-table-column>
                   <!-- 索引列 -->
                   <el-table-column type="index"></el-table-column>
                   <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                   <el-table-column label="操作">
                     <template v-slot="scope">
                       <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                       <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                     </template>
                   </el-table-column>
                 </el-table>
              </el-tab-pane>


              <!-- 静态属性页面 -->
              <el-tab-pane label="静态属性" name="only">
                <!-- 添加属性按钮 -->
                  <el-button type="primary" size="mini" :disabled="isBtnDisable" @click="addOnlyData()">添加属性</el-button>
                  <!-- 静态属性表格 -->
                 <el-table :data="onlyTableDate" border stripe>
                   <el-table-column type="expand">
                     <template v-slot="scope">
                       <!-- 循环渲染tag标签 -->
                       <el-tag v-for="(item , i) in scope.row.attr_vals" :key="i" style="margin-right: 10px" closable @close="handleClose(i,scope.row)">
                           {{item}}
                       </el-tag>
                       <el-input
                       class="input-new-tag"
                       v-if="scope.row.inputVisible"
                       v-model="scope.row.inputValue"
                       ref="saveTagInput"
                       size="small"
                       @keyup.enter.native="handleInputConfirm(scope.row)"
                       @blur="handleInputConfirm(scope.row)"
                       >
                       </el-input>
                       <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button> 
                     </template>
                   </el-table-column>
                   <el-table-column type="index"></el-table-column>
                   <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                   <el-table-column label="操作">
                     <template v-slot="scope">
                       <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                       <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                     </template>
                   </el-table-column>
                 </el-table>
              </el-tab-pane>
            </el-tabs>
        </el-card>

        <!-- 添加参数对话框 -->
      <el-dialog    
         :title="'添加' + titleText"
         :visible.sync="addDialogVisible"
         width="50%"
         @close="addDialogClosed"
         >
         <el-form ref="addFormRefs" :model="addForm" label-width="80px" :rules="addFormRules">
            <el-form-item :label="titleText" prop="attr_name">
              <el-input v-model="addForm.attr_name"></el-input>
            </el-form-item>
         </el-form>
         <span slot="footer" class="dialog-footer">
           <el-button @click="addDialogVisible = false">取 消</el-button>
           <el-button type="primary" @click="addParams">确 定</el-button>
         </span>
      </el-dialog>

      <!-- 编辑参数对话框 -->
      <el-dialog    
         :title="'修改' + titleText"
         :visible.sync="editDialogVisible"
         width="50%"
         @close="editDialogClosed"
         >
         <el-form ref="editFormRefs" :model="editForm" label-width="80px" :rules="editFormRules">
            <el-form-item :label="titleText" prop="attr_name">
              <el-input v-model="editForm.attr_name"></el-input>
            </el-form-item>
         </el-form>
         <span slot="footer" class="dialog-footer">
           <el-button @click="editDialogVisible = false">取 消</el-button>
           <el-button type="primary" @click="editParams">确 定</el-button>
         </span>
      </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return{
          catelist: [],
          cascaderprop:{
              expandTrigger: 'hover',
              value: 'cat_id',
              label: 'cat_name',
              children: 'children'
          },
        //   级联选择框双向绑定数组
          selectedCateKeys: [],
          // 被激活页面的名称
          activeName: 'many',
          // 动态参数数据
          manyTableDate: [],
          // 静态属性数据
          onlyTableDate: [],
          addDialogVisible: false,
          // 添加表单的数据对象
          addForm: {},
          addFormRules:{
            attr_name:[
              {required: true ,message: '请输入数据' ,trigger: 'blur'}
            ]
          },
          // 修改对话框可见属性
          editDialogVisible: false,
          // 修改的表单数据对象
          editForm:{},
          // 修改表格的验证规则
          editFormRules:{
            attr_name:[
              {required: true ,message: '请输入数据' ,trigger: 'blur'}
            ]
          },
          // 控制按钮与文本框的切换显示
          inputVisible: false,
          inputValue: ''
      
        }
    },
    created(){
      this.getCateList();
    },
    methods:{
      async getCateList(){
        const {data:res} = await this.$http.get('categories');
        if(res.meta.status != 200) return this.$message.error('获取分类数据失败')
        // console.log(res);
        this.catelist = res.data
      },
      handleChange(){
        // console.log(this.selectedCateKeys);
        if(this.selectedCateKeys.length != 3){
            this.selectedCateKeys = []
            this.manyTableDate = []
            this. onlyTableDate = []
            this.$message.warning('请选择第三级选项')
            return 
        }
        this.getParamsDate()
        // console.log(this.selectedCateKeys);
      },
      // tab页面点击事件
      handleTabClick(){
        this.getParamsDate()
      },
      async getParamsDate(){
        const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params: {sel: this.activeName}})
        if(res.meta.status != 200) return this.$message.error('获取列表失败')

        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : [] ;
          // 添加一个布尔值控制newtag文本框
          item.inputVisible = false
          // 文本框输入的值
          item.inputValue = ''
        });
        console.log(res.data);
        if(this.activeName === 'many'){
          this.manyTableDate = res.data
          // console.log(res.data);
          // console.log(this.manyTableDate);
        }else{
          this.onlyTableDate = res.data
        }
      },
      addParams(){
        this.$refs.addFormRefs.validate(async valid => {
          if(!valid) return
          const {data:res} = await this.$http.post(`categories/${this.cateId}/attributes`,{attr_name: this.addForm.attr_name,attr_sel: this.activeName})
          if(res.meta.status != 201 ) return this.$message.error('添加参数失败')
          this.$message.success('添加成功');
          this.addDialogVisible = false
          this.getParamsDate();
        })
      },
      addManyData(){
         this.addDialogVisible = true
      },
      addOnlyData(){
        this.addDialogVisible = true
      },
      addDialogClosed(){
        this.$refs.addFormRefs.resetFields()
      },
      // 点击按钮展示修改对话框
      async showEditDialog(attr_id){
        const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{params: {attr_sel: this.activeName}})
        if(res.meta.status != 200) return this.$message.error('获取参数失败')
        this.editForm = res.data
        this.editDialogVisible = true
      },
      // 关闭修改对话框的操作
      editDialogClosed(){
        // 重置表单
        this.$refs.editFormRefs.resetFields()
      },
      // 点击按钮修改参数信息
      editParams(){
        this.$refs.editFormRefs.validate(async valid => {
          if(!valid) return 
          const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{attr_name: this.editForm.attr_name,attr_sel: this.activeName})
          if(res.meta.status != 200) return this.$message.error('修改失败')
          this.$message.success('修改成功')
          this.getParamsDate();
          this.editDialogVisible = false
        })
      },
      async removeParams(attr_id){
        const confirmResult = await this.$confirm('此操作将永久删除该属性, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if(confirmResult !== 'confirm'){
          this.$message.info('已取消')
        }else{
          const {data:res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
          if(res.meta.status != 200) this.$message.error('删除参数失败')
          this.$message.success('删除成功')
          this.getParamsDate();
        }
      },
      // new tag文本框失去焦点或enter触发
      handleInputConfirm(row){
        row.inputVisible = false
        if(row.inputValue.trim().length === 0){
          row.inputValue = ''
          row.inputVisible = false
          return
        }
        row.attr_vals.push(row.inputValue.trim())
        row.inputValue = ''
        row.inputVisible = false
        // 发起请求保存操作
        this.saveAttrVals(row)
      },
      async saveAttrVals(row){
        const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(',')
        })
        if(res.meta.status != 200) return this.$message.error('修改标签失败！')
        this.$message.success('修改标签成功！')
      },
      showInput(row){
        row.inputVisible = true
        // 让文本框自动获取焦点
        // $nextTick当页面上元素重新渲染后进行回调
        this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
      },
      handleClose(i,row){
        row.attr_vals.splice(i, 1)
        this.saveAttrVals(row)
      }
      
    },
    computed:{
      isBtnDisable(){
        if(this.selectedCateKeys.length !== 3){
          return true
        }else{
          return false
        }
      },
      cateId(){
        if(this.selectedCateKeys.length === 3){
          return this.selectedCateKeys[2]
        }else{
          return null
        }
      },
      // 动态标题文本
      titleText(){
        if(this.activeName === 'many'){
          return '动态参数'
        }else{
          return '静态属性'
        }
      }
    }
}
</script>

<style lang="less" scoped>
.input-new-tag{
  width: 120px;
}
</style>